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<h1>sgp4_math.h</h1><a href="sgp4__math_8h.html">Ir a la documentación de este archivo.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef _sgp4_math_</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define _sgp4_math_</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span><span class="comment">/*     ----------------------------------------------------------------</span>
<a name="l00004"></a>00004 <span class="comment">*</span>
<a name="l00005"></a>00005 <span class="comment">*                                 sgp4ext.h</span>
<a name="l00006"></a>00006 <span class="comment">*</span>
<a name="l00007"></a>00007 <span class="comment">*    this file contains extra routines needed for the main test program for sgp4.</span>
<a name="l00008"></a>00008 <span class="comment">*    these routines are derived from the astro libraries.</span>
<a name="l00009"></a>00009 <span class="comment">*</span>
<a name="l00010"></a>00010 <span class="comment">*                            companion code for</span>
<a name="l00011"></a>00011 <span class="comment">*               fundamentals of astrodynamics and applications</span>
<a name="l00012"></a>00012 <span class="comment">*                                    2007</span>
<a name="l00013"></a>00013 <span class="comment">*                              by david vallado</span>
<a name="l00014"></a>00014 <span class="comment">*</span>
<a name="l00015"></a>00015 <span class="comment">*       (w) 719-573-2600, email dvallado@agi.com</span>
<a name="l00016"></a>00016 <span class="comment">*</span>
<a name="l00017"></a>00017 <span class="comment">*    current :</span>
<a name="l00018"></a>00018 <span class="comment">*              20 apr 07  david vallado</span>
<a name="l00019"></a>00019 <span class="comment">*                           misc documentation updates</span>
<a name="l00020"></a>00020 <span class="comment">*    changes :</span>
<a name="l00021"></a>00021 <span class="comment">*              14 aug 06  david vallado</span>
<a name="l00022"></a>00022 <span class="comment">*                           original baseline</span>
<a name="l00023"></a>00023 <span class="comment">*       ----------------------------------------------------------------      */</span>
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;math.h&gt;</span>
<a name="l00027"></a>00027 
<a name="l00028"></a><a class="code" href="sgp4__math_8h.html#a1daf785e3f68d293c7caa1c756d5cb74">00028</a> <span class="preprocessor">#define pi 3.14159265358979323846</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span>
<a name="l00030"></a>00030 
<a name="l00031"></a>00031 <span class="comment">// ------------------------- function declarations -------------------------</span>
<a name="l00032"></a><a class="code" href="classsgp4__math.html">00032</a> <span class="keyword">class </span><a class="code" href="classsgp4__math.html">sgp4_math</a> {
<a name="l00033"></a>00033         <span class="keyword">public</span>:
<a name="l00034"></a>00034         <span class="keyword">static</span> <span class="keywordtype">double</span>  <a class="code" href="classsgp4__math.html#aea3e78c4a67943a23eabdbd4d0585c3e" title="this file contains extra routines needed for the main test program for sgp4.">sgn</a>
<a name="l00035"></a>00035         (
<a name="l00036"></a>00036           <span class="keywordtype">double</span> x
<a name="l00037"></a>00037         );
<a name="l00038"></a>00038 
<a name="l00039"></a>00039         <span class="keyword">static</span> <span class="keywordtype">double</span>  <a class="code" href="classsgp4__math.html#a66bce8799e00fe4c922b9f0434b6128e" title="this procedure finds the magnitude of a vector">mag</a>
<a name="l00040"></a>00040         (
<a name="l00041"></a>00041           <span class="keywordtype">double</span> x[3]
<a name="l00042"></a>00042         );
<a name="l00043"></a>00043 
<a name="l00044"></a>00044         <span class="keyword">static</span> <span class="keywordtype">void</span>    <a class="code" href="classsgp4__math.html#a35d24a138a32d34caaf17e2cf023b947" title="this procedure crosses two vectors.">cross</a>
<a name="l00045"></a>00045         (
<a name="l00046"></a>00046           <span class="keywordtype">double</span> vec1[3], <span class="keywordtype">double</span> vec2[3], <span class="keywordtype">double</span> outvec[3]
<a name="l00047"></a>00047         );
<a name="l00048"></a>00048 
<a name="l00049"></a>00049         <span class="keyword">static</span> <span class="keywordtype">double</span>  <a class="code" href="classsgp4__math.html#ae74041d2049dee6fae0db1c6a7515643" title="this function finds the dot product of two vectors..">dot</a>
<a name="l00050"></a>00050         (
<a name="l00051"></a>00051           <span class="keywordtype">double</span> x[3], <span class="keywordtype">double</span> y[3]
<a name="l00052"></a>00052         );
<a name="l00053"></a>00053 
<a name="l00054"></a>00054         <span class="keyword">static</span> <span class="keywordtype">double</span>  <a class="code" href="classsgp4__math.html#a33722da47f2bfa0849412316cddfabf5" title="this procedure calculates the angle between two vectors.">angle</a>
<a name="l00055"></a>00055         (
<a name="l00056"></a>00056           <span class="keywordtype">double</span> vec1[3],
<a name="l00057"></a>00057           <span class="keywordtype">double</span> vec2[3]
<a name="l00058"></a>00058         );
<a name="l00059"></a>00059 
<a name="l00060"></a>00060         <span class="keyword">static</span> <span class="keywordtype">void</span>    <a class="code" href="classsgp4__math.html#a67021755c597c209e05704690f3324b2" title="this function solves keplers equation when the true anomaly is known.">newtonnu</a>
<a name="l00061"></a>00061         (
<a name="l00062"></a>00062           <span class="keywordtype">double</span> ecc, <span class="keywordtype">double</span> nu,
<a name="l00063"></a>00063           <span class="keywordtype">double</span>&amp; e0, <span class="keywordtype">double</span>&amp; m
<a name="l00064"></a>00064         );
<a name="l00065"></a>00065 
<a name="l00066"></a>00066         <span class="keywordtype">double</span>  <a class="code" href="classsgp4__math.html#a88f575cde2af14c3b7f8e3bb64053e49" title="this function evaluates the inverse hyperbolic sine function.">asinh</a>
<a name="l00067"></a>00067         (
<a name="l00068"></a>00068           <span class="keywordtype">double</span> xval
<a name="l00069"></a>00069         );
<a name="l00070"></a>00070 
<a name="l00071"></a>00071         <span class="keyword">static</span> <span class="keywordtype">void</span>    <a class="code" href="classsgp4__math.html#aafe8e1a26df7d91fb20be252f263a58a" title="this function finds the classical orbital elements given the geocentric equatorial...">rv2coe</a>
<a name="l00072"></a>00072         (
<a name="l00073"></a>00073           <span class="keywordtype">double</span> r[3], <span class="keywordtype">double</span> v[3], <span class="keywordtype">double</span> mu,
<a name="l00074"></a>00074           <span class="keywordtype">double</span>&amp; p, <span class="keywordtype">double</span>&amp; a, <span class="keywordtype">double</span>&amp; ecc, <span class="keywordtype">double</span>&amp; incl, <span class="keywordtype">double</span>&amp; omega, <span class="keywordtype">double</span>&amp; argp,
<a name="l00075"></a>00075           <span class="keywordtype">double</span>&amp; nu, <span class="keywordtype">double</span>&amp; m, <span class="keywordtype">double</span>&amp; arglat, <span class="keywordtype">double</span>&amp; truelon, <span class="keywordtype">double</span>&amp; lonper
<a name="l00076"></a>00076         );
<a name="l00077"></a>00077 };
<a name="l00078"></a>00078 <span class="preprocessor">#endif</span>
<a name="l00079"></a>00079 <span class="preprocessor"></span>
</pre></div></div>
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